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采用厌氧-好氧处理工艺的每天50000m3城市污水治理工程的优化设计设计总说明：本设计所涉及污水主要是来自该地区周围居民区的生活污水与一小型牲畜饲养场的饲养废水，污水量为5万m3/d，COD=600mg/L、BOD5=300mg/L、NH3-N=40mg/L、TP=20mg/L。29851
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根据确定的工艺流程，设计通过对格栅、平流式沉砂池、调节池、初沉池、A/O生物反应池、二沉池、混合反应池、砂滤池和污泥浓缩池等构筑物的主要尺寸的设计计算、水力损失计算及管路的计算，完成设计说明书、工艺流程图(含高层布置)、平面布置图和主体构筑物单体图。
本设计具有技术上可行、经济上合理的效果。投资费用为7010.15万元，运行费用439.9万元/年。每吨水处理费用为0.80元。本设计具有基建费用及运行费用较低，对现有设施的改造较容易，运行稳定，占地面积小，处理效果较好，二次污染少等优点，确保污水处理能够达标排放。污水处理构筑物整体布置紧凑、合理，以实用和美观相结合的总布成花园式污水处理厂，采用目前国内成熟、实用的处理工艺。
该工艺处理城市污水预计能达到《城镇污水处理厂污染物排放标准》(GB8978-2002)排放标准，COD≦100mg/L；BOD5≦20mg/L；NH3-N≦8mg/L；TP≦3 mg/L，每年削减向环境排放的COD 为10950吨。达到消除污染、实现保护环境、造福人类的目的。
毕业论文关键词: 污水处理；A/O处理工艺；活性污泥法；脱氮
Optimized design of Anaerobic aerobic treatment process for 50000m3/d of municipal sewage treatment engineering
Abstract：This design is mainly involved in waste water from domestic sewage in the region.The initial design plans: The amount of sewage is 50000 m3/ d.The indicator of waste water quality standard is COD=600mg/L、BOD5=300mg/L、NH3-N=40mg/L、TP=5.0mg/L.
In accordance with the established process, the design selects the process parameters of structures (including the grating, the horizontal flow sedimentation tank, regulating tank, the primary settling tank, A/O biological reaction tank, secondary sedimentation tank, a mixed reaction tank, sand filter and sludge concentration tank) and calculates the main size, the hydraulic loss, and finished of introduction of design process, process flow diagram, factory layout and main monomer structure map.
The design is technically feasible and economically reasonable results. The project cost39.57million yuan, investment, operating costs 5.5526million yuan/ year. Equivalent to the sewage treatment costs 0.36 yuan/m3.The design strictly follow countries related regulations,specification and standard which ensure that the processing water quality index reached the appropriate countries emissions standard,referred related design manual and other literature information;the layout of water treatment device is compact and smooth ,meanwhile,it is supposed to reduce occupied area as far as possible,adhere to the total chief principles by combination of practical and beautiful phase,select simple process.
The treated waste water is expected to achieve the level of " pollutant discharge standards of urban sewage treatment plant"(GB8978-2002), that is: COD≦100mg/L；BOD5≦20mg/L；SS≦100mg/L；NH3-N≦8mg/L；TN≦20 mg/L ；TP≦3mg/L,reducing emissions to the environment each year for the 10950 tons COD.So that contaminated water can be greatly improved, to achieve the aim of elimination of pollution, protection of the environment and the purpose of the benefit of human being.
Key Words: waste water treatment; A/O process; activated sludge process; nitrogen； removal
目录
1绪论 1
1.1 设计背景 1
1.2 设计依据与原则 1
1.2.1 设计依据 1
1.2.2 设计原则 2